A memory efficient way to copy variables.
copy(dest,src)
numbers := []int{1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}
// Create copy with only needed numbers
neededNumbers := numbers[:len(numbers)-10]
numbersCopy := make([]int, len(neededNumbers))
copy(numbersCopy, neededNumbers)